“Mushrooms of Ontario” by R.E. Stone, published in 1918 by the Ontario Department of Agriculture, is a seminal work that serves as both a practical guide and a scientific reference for identifying mushrooms in Ontario. This publication, part of the department’s Bulletin series, was designed to aid both amateur and professional mycologists in distinguishing between edible and poisonous species found in the region.

The book is structured to facilitate easy identification, featuring detailed descriptions of various mushroom species accompanied by illustrations. It emphasizes the importance of accurate identification, providing clear guidelines to help readers differentiate between similar-looking species, some of which may be toxic. Stone’s work reflects the early 20th-century scientific understanding of mycology and offers insights into the flora of Ontario during that period.

While “Mushrooms of Ontario” is a valuable historical document, it also serves as a reminder of the evolving nature of mycological studies. Advancements in the field have led to more comprehensive and updated resources, but Stone’s publication remains a testament to the foundational work in mushroom identification and the study of fungal biodiversity in Ontario.

R.E. Stone’s “Mushrooms of Ontario” is a pioneering guide that laid the groundwork for future mycological research and education in the region. Its practical approach and scientific rigor continue to be appreciated by those interested in the study of mushrooms and the natural history of Ontario.